Date: 02 Aug 1999 12:54:10 +0200 From: Dag-Erling Smorgrav <des@flood.ping.uio.no> To: Tim Vanderhoek <vanderh@ecf.utoronto.ca> Cc: "David O'Brien" <obrien@FreeBSD.org>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/usr.bin/yacc skeleton.c Message-ID: <xzpvhay312l.fsf@flood.ping.uio.no> In-Reply-To: Tim Vanderhoek's message of "Fri, 30 Jul 1999 17:32:58 -0400" References: <199907301253.FAA41352@freefall.freebsd.org> <19990730080134.A25703@dragon.nuxi.com> <19990730173258.A67094@mad>
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Tim Vanderhoek <vanderh@ecf.utoronto.ca> writes:
> On Fri, Jul 30, 1999 at 08:01:35AM -0700, David O'Brien wrote:
> > Since I was actively working in this file, I would have prefered an email
> > and a chance to fix it. Rather than spam this file with what ended up as
> Fair enough. You're right, but in my defense, when I made the
> change I was thinking more about the fact that this was either the
> third or fourth time -current had been broken within the last week,
> some for really dumb things (like XXX in the header, or rcsid in
> skeletons, and I suppose I have to list hyphens in identifiers, too).
It's still broken. I have to boxen that panic during boot if APM is
enabled, and my box at work (a reasonably new machine with no history
of hardware trouble and a fairly long uptime until today) panicked in
the middle of a build this morning, with a brand new -CURRENT kernel:
GNU gdb 4.18
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GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
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This GDB was configured as "i386-unknown-freebsd".
(kgdb) file symbols.0
Reading symbols from symbols.0...done.
(kgdb) core vmcore.0
IdlePTD 2949120
initial pcb at 21e3a0
panicstr: page fault
panic messages:
---
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0xc15cbff0
fault code = supervisor write, page not present
instruction pointer = 0x8:0xc01b9028
stack pointer = 0x10:0xc8bfb968
frame pointer = 0x10:0xc8bfb978
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 962 (sh)
interrupt mask = net bio cam
trap number = 12
panic: page fault
syncing disks... 6 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 giving up
dumping to dev (3,1), offset 786464
dump 126 125 124 123 122 121 120 119 118 117 116 115 114 113 112 111 110 109 108 107 106 105 104 103 102 101 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
---
#0 boot (howto=256) at ../../kern/kern_shutdown.c:291
291 dumppcb.pcb_cr3 = rcr3();
(kgdb) where
#0 boot (howto=256) at ../../kern/kern_shutdown.c:291
#1 0xc012ba30 in at_shutdown (
function=0xc01f430f <__set_sysinit_set_sym_nexus_rootmodule_sys_init+1751>, arg=0xc8bdc360, queue=-926959320) at ../../kern/kern_shutdown.c:505
#2 0xc01bb2e1 in trap_fatal (frame=0xc8bfb928, eva=3244081136)
at ../../i386/i386/trap.c:907
#3 0xc01bafb9 in trap_pfault (frame=0xc8bfb928, usermode=0, eva=3244081136)
at ../../i386/i386/trap.c:800
#4 0xc01bac37 in trap (frame={tf_fs = 16, tf_es = 16, tf_ds = 16, tf_edi = 0,
tf_esi = 0, tf_ebp = -926959240, tf_isp = -926959276,
tf_ebx = -1066580808, tf_edx = -927073876, tf_ecx = -1050886160,
tf_eax = 0, tf_trapno = 12, tf_err = 2, tf_eip = -1071935448, tf_cs = 8,
tf_eflags = 66118, tf_esp = -927073984, tf_ss = -926957952})
at ../../i386/i386/trap.c:426
#5 0xc01b9028 in pmap_remove_pages (pmap=0xc8bdf9a4, sva=0, eva=3217022976)
at ../../i386/i386/pmap.c:2981
#6 0xc0124d93 in exec_new_vmspace (imgp=0xc8bfbe80)
at ../../kern/kern_exec.c:444
#7 0xc011cfc9 in exec_elf_imgact (imgp=0xc8bfbe80)
at ../../kern/imgact_elf.c:460
#8 0xc01247b0 in execve (p=0xc8bdc360, uap=0xc8bfbf80)
at ../../kern/kern_exec.c:179
#9 0xc01bb51e in syscall (frame={tf_fs = 47, tf_es = 47, tf_ds = 47,
tf_edi = 134887016, tf_esi = -1, tf_ebp = -1077946496,
tf_isp = -926957612, tf_ebx = 134886852, tf_edx = 134886852,
tf_ecx = 134887024, tf_eax = 59, tf_trapno = 12, tf_err = 2,
tf_eip = 134653696, tf_cs = 31, tf_eflags = 582, tf_esp = -1077946524,
tf_ss = 47}) at ../../i386/i386/trap.c:1056
#10 0xc01b0186 in Xint0x80_syscall ()
Cannot access memory at address 0xbfbfd780.
(kgdb) quit
DES
--
Dag-Erling Smorgrav - des@flood.ping.uio.no
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